Cable clamp



April 17, F E. JQHNSON 2,373,833

.CABLE CLAMP Filed Aug. 24, 1945 Ji E E37/73E'. Jofamon' www3 I 'together' f UN I"l`*l`-D 'l STATES PAT-EN ,FIC-E v QCABLE CLAMP Frank E. Johnson, MaldenfMasus'.; Aassigner :toi .f j United-Carr Fastener Corpo'ration;r Cambridge, M/a'ss.,":a corporation of Massachusettsff f v Application August .24,1943;seria,trattasse"i Y zclaim's. (oizisivrriP-i'- The present invention relates to cable clamps for clamping a plurality of electrical cables together in gripping relation and aims generally to simplify and improve existing clamps for this purpose.

One of the primary objects vof the invention is to provide a clamp that can be readily adjusted to accommodate groups of cables of various sizes. A further object of the invention is to provide a cable clamp made from a single strip of sheet metal which may be provided with a spongerubber, or the like, lining secured to the same to prevent chang of the insulation on electrical cables, the clamp being of such construction that it may be readily adjusted to various sized loops according to the size and number of the cables tobe clamped. f

A further object of the invention is the provision of an adjustable cable clamp of extremely simple construction which may be formed from .a single strip of metal at avery low cost andv which y may be quickly and' easily attached to a support-r ing part by snap fastener means, thus reducing the cost of the construction aswell as the assembly of the installation. f f

Other objects. and advantages of the invention end thereof. The base portion II) preferably comprises an attaching portion` I2 formed with a plurality of apertures I3 for the reception of securing means which may be in the form of rivets I4 (Fig. 1) or the snap fastener securing means I5 (see Fig. 4). The clamp'also includes a porl tion I6 disposedsangularly to the attaching porwill be apparent from an inspection of the accompanying and annexed specification illustrating and describing preferred embodiments of the in-y vention. n l In the drawing: Fig. 1 is an enlargedside elevation of myimproved cable clamp; v

Fig, 2 is a plan view of the fabricated blank from which the clamp is made and before itis bent to shape (the liner being riveted in place) Fig. 3 is a front elevation of the clamp; and Fig. 4 is an enlarged transverse sectional View tion, which portion is provided with a transverse slot I 'I adjacent the attaching portion and a projection I8 beyond the slot I1. The portion I6 beyond the slot I1 constitutes a part ofthe band.

The band portion I I of the clamp extends from' the base beyond the slot I1 and preferably has attached thereto a strip of flexible insulating material I9 and preferably this insulating material is a highly yieldable materiaL' for example sponge rubber.l Preferably the strip of sponge rubber may be secured to the band and adjacent portion I6 of the base bysuitable means, as for-example rivets 20 Vorthe like.

The terminal-end portion ofthe band I I beyond the insulating strip I 9 is preferably provided with a plurality of apertures 2l, or other means for selective engagement with' the projection I8 as.

will be apparent.

The band II and its associated insulating strip is adapted to be bent to form an enclosed loop, as illustrated in Figs. l and 4,v the terminal 'end being passed through the aperture I 1 and underlying the adjacent portion I 6 of the clamp. A group ofinsulated cables or conductors C may be positioned within the enclosed loop and engaged by the inner face of the insulating strip. When the loop is suciently constricted by progressively forcing the band through the aperture I1 so as to grip the assemblage'of cables; the terminal .end

n may be secured against expansionv 'by'seating the thereof illustrating a modified form of attaching l the clamp to a support.

Referring to the drawing,y my improved cable clamp is adapted to be secured to a suitable supporting surface, preferablyan apertured support;

which may be a part of the framework I` of an aircraft, motor vehicle, ship, building or like structure and along 'which it is desired to run a plurality of electrical conductors and clamp them in grouped relationship at selected points.

In the illustrated embodiment ofthe invention the improved clamp of the present invention-is formed from a single strip of material, as for example sheet metal, having a relatively wide and stiff base portion D at one end thereof and a relatively flexible elongated band AI I at the'other projection I 8 of the base selectively in one of the' apertures 2| in the terminal end of the band. y

Instead of riveting or otherwise securely fastening the base of the clamp to the support, the clamp may be effectively attached to the support by merely passing suitable snap fastenersI through openings I3 of the base which are aligned l with openings 2 of the support I, as shown 1n Fig. 4. These fasteners may be of any suitable construction but preferably have a button-like head, a resilient split shank 26 and shouldered portions 21. lAny convenient form `of fastener suitable for the purpose may be used.

It will' be apparent from the foregoing kthat the i' improved cable clamp of the present invention is extremely simple in construction, cheap in cost of manufacture and may bereadily mounted and assembled in the installation in a minimum of time and with a minimum of effort, thus materially reducing the cost of and time required for completion of the installation.

Although I have illustrated and described, prel erred forms of my invention, I do not Wish to be limited thereby because the scope of my invention is best deiined by the following claims.

I claim:

1. A cable clamp for clamping a plurality` of l' cables in grouped assembly comprising an elongated strip of metal having a'relatively stiff base including a portion adapted to be secured to a support and an angularly disposed portion formerlvvith an elongated slot therein,` arelatively exible. band extending from the angularly. disposed-.por-N tion of said base and capable of beingg bent. .tof

form an enclosed loop with the terminal end.

portion of said band passed tlirougliv said` slot; a projection on said clamp beyond said sloth-.andi ai plurality of apertures in said band for selective locking engagement with said projection whereby the size of said loop may be varied.

2. A cable clamp for clamping a plurality of cables in grouped assembly comprising an elongated strip of metal having a relatively stiff base 

